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Finding the Fourth Proportional to 80,503.62, 120,842.90 and 68,081.46

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Solution

The fourth proportional to 80,503.62, 120,842.90 and 68,081.46 is: 102,196.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,503.62 : 120,842.90 = 68,081.46 : x
  2. Step 2: Convert to fraction form
    80,503.62/120,842.90 = 68,081.46/x
  3. Step 3: Cross multiply
    80,503.62x = 120,842.90 × 68,081.46
  4. Step 4: Simplify right side
    80,503.62x = 8,227,161,062.63
  5. Step 5: Solve for x
    x = 8,227,161,062.63/80,503.62
  6. Step 6: Final answer
    x = 102,196.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.